A magnetic cobalt(ii) complex based on 4,4'-bipyridine-itaconic acid derivative ligand and its preparation method

A technology of bipyridine and itaconic acid, which is applied in the fields of magnetism and organic chemistry of organic materials/organic magnetic materials, can solve problems such as the lack of establishment of relevant laws and in-depth research, and achieve a wide range of applications and application prospects, and good stability sexual effect

Active Publication Date: 2021-03-02
SHANGQIU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[Chem. Commun. 2014, 50, 1906−1908; J. Am. Chem. Soc. 2014, 136, 4484−4487; Inorg. Chem. 2016, 55, 5578−5584] In recent years, research on molecular magnet materials Some progress has been made, but the relevant research is still in its infancy, and there are problems such as in-depth research and no establishment of relevant laws, and there is still a certain distance from practical application

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  • A magnetic cobalt(ii) complex based on 4,4'-bipyridine-itaconic acid derivative ligand and its preparation method
  • A magnetic cobalt(ii) complex based on 4,4'-bipyridine-itaconic acid derivative ligand and its preparation method
  • A magnetic cobalt(ii) complex based on 4,4'-bipyridine-itaconic acid derivative ligand and its preparation method

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Effect test

Embodiment 1

[0022] The preparation method of the magnetic cobalt(II) complex based on the 4,4'-bipyridine-itaconic acid-derived ligand of this embodiment is as follows:

[0023] 1200 microliters of 0.5mol / L Co(NO 3 ) 2 , 800 microliters of 0.5 mol / L itaconic acid in water, and 400 microliters of 4,4'-bipyridine in 0.5 mol / L ethanol solution were placed in a 15 mL vial, and then 6 mL of deionized water was added to the Under stirring, 1 mol / L sodium hydroxide aqueous solution was added dropwise to adjust the pH to 3.0, stirred for 10 minutes, sealed, then placed in a constant temperature drying box at 90 °C for 24 hours, cooled to room temperature, and a large amount of red can be obtained. The crystals were filtered, washed with water three times, and dried at room temperature to obtain a cobalt (II) complex with a yield of 0.136 g and a yield of 85.9%.

[0024] (1) The obtained crystal samples were characterized by a Bruker D8 ADVANCE powder X-ray diffractometer, and the peak positions...

Embodiment 2

[0032] The preparation method of the magnetic cobalt (II) complex based on the 4,4'-bipyridine-itaconic acid derivative ligand of the present embodiment, the steps are as follows:

[0033] 640 microliters of 0.5mol / L Co(NO 3 ) 2 , 400 microliters of 0.5 mol / L itaconic acid in water, and 200 microliters of 0.5 mol / L ethanol solution of 4,4'-bipyridine were placed in a 15 mL vial, and then 5 mL of deionized water was added to the Under stirring, add 1 mol / L sodium hydroxide aqueous solution dropwise to adjust the pH to 2.8, stir for 8 minutes, seal it, then place it in a constant temperature drying box at 90°C for 30 hours, and cool to room temperature to obtain a large amount of red The crystals were filtered, washed with water three times, and dried at room temperature to obtain a cobalt(II) complex.

Embodiment 3

[0035] The preparation method of the magnetic cobalt (II) complex based on the 4,4'-bipyridine-itaconic acid derivative ligand of the present embodiment, the steps are as follows:

[0036] 840 microliters of 0.5mol / L Co(NO 3 ) 2 , 600 microliters of 0.5 mol / L itaconic acid in water, and 300 microliters of 0.5 mol / L ethanol solution of 4,4'-bipyridine were placed in a 15 mL vial, and then 3 mL of deionized water was added to the Under stirring, add 1 mol / L sodium hydroxide aqueous solution dropwise to adjust the pH to 3.0, stir for 5 minutes, seal it, then place it in a constant temperature drying box at 90 °C for 35 hours, cool to room temperature, and get a lot of red The crystals were filtered, washed with water three times, and dried at room temperature to obtain a cobalt(II) complex.

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Abstract

The invention discloses a magnetic cobalt (II) complex based on a ligand derived from 4,4'-bipyridine-itaconic acid and a preparation method thereof. The molecular formula is {[Co(HL) 2 (H 2 O) 2 ]·2NO 3} n , HL represents a ligand derived from 4,4'-bipyridine-itaconic acid that removes a carboxylic acid hydrogen, the single crystal structure has a one-dimensional chain structure, and its asymmetric building block contains half a cobalt(II) ion, a 4,4'-bipyridine-itaconic acid-derived ligand, a terminal coordinated water molecule and a free nitrate anion; the pyridine nitrogen of 4,4'-bipyridine and the double bond in itaconic The addition reaction synthesizes a semi-rigid carboxylic acid ligand containing N(+)-C bonds, and the ligand reacts with cobalt(II) ions to form a cobalt(II) complex in situ; the cobalt(II) complex is in It has slow magnetic relaxation phenomenon at low temperature, and is used as a molecular-based magnetic material in information storage and quantum computing.

Description

technical field [0001] The invention relates to a magnetic cobalt (II) complex based on a 4,4'-bipyridine-itaconic acid derivative ligand and a preparation method thereof, as well as its application in the fields of information storage, quantum computing and the like, belonging to molecular-based magnetic material technology field. Background technique [0002] Molecular-based magnetic materials are a class of magnetic compounds formed by chemically combining free radicals or paramagnetic ions (including transition metal ions and rare earth metal ions) and diamagnetic ligands in a spontaneous and controlled assembly manner. With the continuous development of materials science, molecular-based magnetic materials have quickly become a very important part of this research field because of their unique properties as a new type of soft material. An emerging field of science that physicists and biologists take very seriously. Compared with traditional magnets, molecular-based ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D213/04H01F1/42
CPCC07D213/04H01F1/42
Inventor 李忠义赵兵翟滨吴冬青邵梅玲
Owner SHANGQIU NORMAL UNIVERSITY
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